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Need urgent help with a lc circuit damping question

 
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mikesmith2103



Joined: 05 Apr 2011
Posts: 1
Location: like physics

PostPosted: Tue Apr 05, 2011 10:19 am    Post subject: Need urgent help with a lc circuit damping question Reply with quote

Question 1 (14 marks)
A 5.0 mH inductor is connected in series to a charged capacitor and a switch. It is found that after the switch is
closed the circuit oscillates at a frequency of 1 kHz but that an oscilloscope shows that 0.1 seconds after the
switch was closed the amplitude of the current has fallen by 7% of its initial value.
(a) What is the value of the capacitor?
(b) What is the value of the total resistance in the circuit?
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